casey



(Nb Model.)

a T. A. CASEY. PNBUMATIQDESPATGH TUBE.

Patented Nov. 2, 1897.

6 avwmdto t m: ohms PETERS 0o. monxumo" wuumni'on, u. c.

. gas, preferably atmospheric air.

NITED STATES ATENT FFrcn.

THOMAS A. CASEY, OF NEW YORK, N. Y., ASSIGNOR TO FRANCIS W. JONES, OFSAME PLACE.

' PN EU MATlC-DESPATCH TUBE.

SPECIFICATION forming part of Letters Patent No. 592,765, dated November2, 1897.

Application filed January 20,1897. Serial ITO/619,905. (N0 model.)

To all whom it may concern.

Be it known that I, THOMAS A. CASEY, a citizen of the United States, anda resident of New York, in the county and State of New York, have madecertain new and useful Improvements in Pneumatic-Despatch Tubes, ofwhich the following is a specification.

My invention is an improvement in pneumatic despatch or carrier tubes.

The object of my invention is to automatically cut off the propulsivecurrent of air just before the carrier has arrived at its destinationwithout interposing any mechanical obstruction in the path of thecarrier, whereby I save wear upon and injury to such carrier. I providean opening in the wall of the tube near the destined point or station.Surrounding this opening upon the exterior of the tube is a chamber,which may be cylindrical. In the chamber or cylinder is a valve having apiston or similar mechanical attachment. A spring or similar retractingdevice tends to force the valve into position to close the aperture oropening in the tube. imity to this valve there are two electricalcontact-points, one of which is movable and has a spring tending to drawit into engagement with its companion contact. At the station startingor sending the carrier or at the point where is located the means forapplying the propulsive air-current, or both, there is an electromagnetto control such means of turning on and off or applying the air. Anelectric circuit includes this magnet and the described contact-points.

The carrier in its passage forces air against the valve, which is thuscaused to release the movable circuit-closing point or contact to closethe circuit, energize the magnet,and cut off the propulsive air-current.

The accompanying drawing illustrates my invention.

P is a well-known arrangement of pneumatic tube.

R is a reservoir of any suitable compressed It is supplied through meansof the engine E and cylinder and pump 0, of any well-known construction.

In prox- I have shown two stations, and Y. At-

X there is an electromagnet V M, having an armature a, carrying abell-hammer. There is a bell or signaling device B. The armature-lever ais provided with a hook or catch it in position to engage with leverLwhen the door 9 is closed and the valve V open. At station Y there is ahole or aperture oin the side wall of the tube, surrounding which is achamber or cylinder E. There is avalve d normally held against the hole0 by means of the spring 5, said valve having a rod 1" fixed to it andextending outside of the box or inclosure E. This rod T has a hook orcatch m upon its outer end, which holds the movable contact Z away fromthe fixed contact or stop 19. The movable contact Z is pivoted at 13,and a retracting-spring l4, acting contrary to the spring 5, tends todraw said contact Z toward the fixed contact 13. From the contact 19 aconductor extends to the terminal of the magnet M at thestarting-station X, and from the movable contact Z a conductor 2 extendsto the second terminal of said magnet. There isa battery MB located insaid circuit, and when the contacts Z 1) are closed the magnet M isenergized.

The operation of the apparatus is as follows: Referring to station X,when the carrier has been introduced for transmission to station Y thedoor g is lifted by hand and' closed, where it is engaged and held inposition by the catch a on the armature-lever a,

valve V being simultaneously opened. As

the carrier passes station Y the. air in the tube forces the valve 01away from opening 0, releasing lever Z, which contacts with stop 10,current passing via wires 1 and 2 to magnet M, which is energized andattracts its armature a, releasing the valve-lever L. Door g is openedby gravity, valve V closed, and

at the same time a signal is sounded whereby the arrival of the carrierat the distant station is made known.

hat I claim, and desire to secure by Letters Patent, is

l. The combination of a pneumatic tube, an opening in the wall of thetube at or near one station, an exterior chamber inclosing said opening,a valve in said chamber, a spring holding said valve in position toclose said opening, a contact-point, a movable contactpoint, a springtending to draw the movable contact into engagement with the first-namedcontact, a mechanical connection between the valve and movable contact,111 cans for cutting off the propulsive air-current at a separated ordistantpoint, an clectroniagnet controlling such means, and an electriccircuit including said contact-points and magnet, substantially asdescribed.

2. The combination of a pneumatic tube,

an opening in the wall of the tube at or near one station, an exteriorchamber inclosing said opening, a valve in said chamber, contact-pointscontrolled by said valve, means for controlling the propulsiveair-current, an electromagnet controlling such means, and an electriccircuit including said contactpoints and magnet,substantially asdescribed.

3. The combination of a pneumatic tube, an opening in the wall of thetube at or near one station, an exterior chamber inclosing said opening,a valve in said chamber, contact-points controlled by said valve, adevice for controlling an entrance to said tube, an electromagnetoperating said device and an electric circuit including saidcontact-points and magnet, substantially as described.

THOMAS A. CASEY. \Vitnesses:

XVATER S. PLACE, F. W. J ones.

